#include<stdio.h>
int main()
{
    Long Long n;
    if(scanf("%lld",&n)!=1||n<=0)
    {
        printf("InvalidI Input");
        return 0;
    }
    char result[70];
    char index=0;
    while(n>0)
    {
        if(n%2==0)
        result[ndex++]='3'
        else
        result[index++]='4';
    n/=2;
    }
    for(int i=index-1;i>=0;i--)
    {
        printf("%c",resul[i]);
    }
    return 0;
}